I have a Aquaclear filter in my 10g betta tank, which shows up as black against the back of the tank. The problem is that creates kind of a mirror effect and my betta will flare up everytime he looks up at it. I tried using a black background, but that just made things worse as he started flaring up along the whole side. I did a test and put a magazine inbetween the filter and the tank, which left only a small part of the filter showing, then my betta started flaring up at that part where the magazine wasn't covering. Is there something that I can put up to block out the filter but not look too tacky? I was thinking a plant but it would be right below the filter and may bow down in the current. Any suggestions?